<template>
    <div>
        <!-- 面包屑导航区 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>数据统计</el-breadcrumb-item>
            <el-breadcrumb-item>数据报表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图 -->
        <el-card>
            <!-- 为echarts准备一个具备宽和高的Dom -->
            <div ref="main" style="width:600px; height:400px;"></div>
        </el-card>
    </div>
</template>

<script>
// 导入echarts
import echarts from 'echarts'
import _ from 'lodash'

export default {
    name:'Report',
    data() {
        return {
            // 需要合并的数据
            options: {
                title: {
                    text: '用户来源'
                },
                tooltip: {
                    trigger: 'axis',
                    axisPointer: {
                        type: 'cross',
                        label: {
                            backgroundColor: '#E9EEF3'
                        }
                    }
                },
                grid: {
                    left: '3%',
                    right: '4%',
                    bottom: '3%',
                    containLabel: true
                },
                xAxis: [
                    {
                        boundaryGap: false
                    }
                ],
                yAxis: [
                    {
                        type: 'value'
                    }
                ]
            }
        }
    },
    methods: {
        
    },
    // DOM节点已经被渲染完毕了
    async mounted() {
        // 基于准备好的dom，初始化echarts实例
        let myChart=echarts.init(this.$refs['main'])
        
        const {data:result}=await this.$http.get('reports/type/1')
        if(result.meta.status!==200){
            this.$message.error('获取折线图失败')
        }else{
            // 准备数据和配置项
            const res=_.merge(result.data,this.options)

            // 展示数据
            myChart.setOption(res)
        }
    },
}
</script>

<style lang='less' scoped>

</style>